Dust and shavings collector



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A. G. &- W; F. BOEHNING.

DUST AND SHAVING COLLECTOR.

(No Model.)

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Paton N. PETERS. Plmlo-Lillwgrnpher. Walhmghm. D. c.

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A. G. 82; W. F. BOEHNING. DUST AND SHAVING COLLECTOR.

No. 375,983. Patented Jan. 3, 1888.

74 7 Znamw. I71 Vania (5g. Quinn: C'Bwlzwlny: wzzzzmflzwimm UNITED STATES PATENT OFFICE.

ANDREW G. BOEHNING AND WILLIAM F. BOEHNING, OF MINNEAPOLIS,

MINNESOTA.

ous'r AND SHAVINGS COLLECTOR.

SPECIFICATION forming part of Letters Patent No. 375,983, dated January 3, 1888.

Application filed July 18, 1857.

To all whom it may concern:

Be it known that we, ANDREW O. BOEHN- mo and WILLIAM F. BOEHNING, of Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Dust and Shavings Collectors, of which the following is a specification.

Our invention. relates to improvements in .room or other receptacle.

The invention consists,generally,in the construction and combination hereinafter described, and particularly pointed out in the claims.

In the accompanying drawings, forming a part of this specification, Figural is a vertical section showing one form of device and its arrangement in connection with a blast-fan, conveyer, and dust-receptacle. Fig. 2 is a detailseotion of our collector, showing a slightlymodified arrangement of the deflecting-plates. Fig. 3 is a detail section showing another ar rangement of the deflecting-plates. ,Fig. 4 is a perspective view partly broken away to show the arrangement of the deflecting-plate.

In the drawings, 6 represents an ordinary suction and blast fan provided with an intake pipe, 7, connected with the open center of its case. This pipe may be arranged in any of the well-known ways with an open mouth that is in proximity to woodworking machinery or to an aspirating trunk or chamber of wheatcleaning orother machinery; or it may be connected in the ordinary way with a middlingspurifier. v

No invention is claimed in the fan itself or in its connection with the devices with which it is usually employed. We intend it to represent any fan that is used for creating a suc- Serial No. 244,585. (No model.)

tion, and thereby causing a current of air laden with dust, shavings, chaff, bran, or other light material to pass into the fan-case and be blown out through the exit-pipe on the other side of the fan.

3 represents a suitable conveyer or conductor, that is connected with the exit-opening of the fan-case and extends to any desired point, for the purpose of conducting the air current and the'material carried thereby to the point where the dust-collector is located.

4 represents a suitable dust-receptacle or dust-room in which it is desired to deposit the material that is carried by the air-current. This receptacle is preferably air tight,or substantially so, and forms a dead-air space into which the material carried by the aircnrrent is forced while the air-current freed from such material is allowed to escape in the manner hereinafter described.

2 represents a suitable tube, constructed of any material and any desired form, that is joined to the conductor 3, hereinbefore described, so as to form a continuation thereof,

tube 2 ispreferably provided within the dustreceptacle with a contracted discharge-opening, preferably formed by contracting the end of the tube. WV'e have here shown the top of the tube within the receptacle provided with an inclined wall, 13, leaving only a narrow opening at the inner end of the tube. Any other equivalent might, however, be used. The tube 2 is also provided, preferably, at a point near the dust-receptacle with an opening for the discharge of the air. This opening will for convenience usually be arranged in the top wall of the tube 2. A ventilating pipe or tube,

' 8, is joined to the tube 2 over this opening and extends to any convenient point. This pipe is used merely for convenience in conducting the escaping current of air to any convenient point where it may be discharged. The operation of the dust-collector is the same whether this tube is used or not, and where it is no objection to have the air discharged directly from the tube 2 the pipe 8 may be omitted. A deflecting-plate, 10, is arranged. in the tube 2 opposite the air-discharge opening and extends.

toward the center of the tube and toward its discharge end, forming an opening, 11, through and projects into the dust-receptacle 4. The

which the air escapes from the tube 3 through the opening in its wall into the tube 8. The inner end ofthe tube 2 is also preferably provided with a slide, 12, by means of which the area of the discharge-opening maybe contracted when desired. An opening, 14, may be formed in the inclined wall 18 at a point near the inner end of the deflecting-plate 10. This opening, however, is not essential to the operation of the device, and maybe omitted when desired. \Vhen this opening is used, the parts of the wall 18 are preferably not in line with each other, the upper end of the lower section of the wall being above the lower end of the upper section, for the purpose hereinafter set forth. able shape and size and of any suitable material.

The operation of the device is substantially as follows: A current of air, carrying with it dust, shavings, or other light material, is drawn into the fan 6 and blown through the conductor 3 into the tube 2. The dust-receptacle forms a dcadair space, into which the air-current is prevented from entering by reason of the confined body of air within said receptacle E. As the air-current enters the contracted space under the deflectingplate 10, its force is increased, and the dust, shavings, 850., carried by it are projected through the open end of the tube 2. The air-current is expanded after it passes the lower end of the plate 10 and passes into the tube 8 and escapes. A portion of the finer material strikes against the inclined wall 13, and is carried along the under surface of said wall toward the tube 8 by what may be termed the outer or least forcible part of the air current. It moves up this wall to the opening 14, and passes through this opening into the dust-receptacle 4.

In Fig. 2 I have shown the collector provided with two deflecting-plates, 10, and in Fig. 3 I have shown it provided with a series of said plates. The operation in these cases is similar to that already described, except that the current of air is partially contracted by each of the dellectingplates, a portion of it escapes through the opening above each plate, and the remainder is further contracted, and then expanded as it passes each of the other places, until, finally, all or substantially all of the air has escaped, while the material carried by the air-current passes into the receptacle. It will be seen that as the opening for the escape of the air is at the upper side of the tube 2 the portion of the air-current that is freest from the dust will be that which will first be expanded as it passes the plate 10. As the current is gradually expanded, it lets go, as it were, of the dust or other material which is held by gravity toward the bottom of the tube, and is carried byits inertia through the open end of the tube into the dust-receptacle.

As hereinbefore stated, this device may be used in connection with any machinery or apparatus where it is desired to separate light particles ot'material, such as before mentioned,

The collector may be made of anysuitfrom a blast of air, and we do not confine ourselves to its use in connection with any particular apparatus. \Ve prefer to manufacture the collector itself by which we mean the device shown in Figs. 2 and 3, or a similar portion of the apparatus shown in Fig. 1) separately, and then apply it in connection with a blast-fau and dust-receptacle wherever it is desired.

Ne claim as our invention- 1. The dust-collector herein described, consisting of the tube 2, having a contracted discharge-opening, and having an opening in its wall for the discharge of the purified air, and an inclined detlectingplate, 10, arranged in said tube 2 and extending toward its discharge end.

2. The dust-collector herein described, consisting of the tube 2, having a contracted end and provided with the opening 14 therein, the tube 8, connected with said tube 2, and a deflecting-plate, 10, arranged in said tube 2 and extending from the lower end of said tube 8 toward the contracted opening of the tube 2, substantially as described.

3. The coinbination,with the fan 6 and the conveyer 3, of the dust-receptacle t, the tube 2, connected with said conveyerS, extending into said dust-receptacle and provided with a dischargeopening within said receptacle and with an opening in its wall for the discharge of the purified air, and a deflecting plate, 10, arranged in said tube 2 opposite the opening in the wall and extending toward the discharge end of the tube 2, substantially as described.

4. The combination,with the fan 6 and conveyer 3, of the dust-receptacle 4-, and the tube 2, provided within said receptacle, with a contracted dischargeopening, the tube 8, connected with the upper side of said tube 2, and an inclined deflecting-plate, 10, arranged in said tube 2 below the end of said tube 8 and extending toward the discharge end ofthe tube 2, substantially as described.

The combination, in a dust-collector, with the tube 2, provided with a contracted discharge'opcning, of the tube 8. connected with thesaid tube 2, and a series ofdellccling-plates, 10, arranged in said tube 2, below said tube 8, substantially as described.

6. The dust-collector herein described, comprising a suitable tube, 2, having a dischargeopening for the escape of dust or other material, an opening in its wall for the escape of the purified air, and an inclined deflectingplate arranged in said tube opposite said opening and extending toward its discharging end, substantially as described.

In testimony whereof we have hereunto set our hands this 9th day of July, 1887.

ANDRElV C. BOEHNING. I \VILLIAM F. BOEHNING.

In presence of- A. 0. PAUL, R. H. SANFORD. 

